I'm new to all this, so please forgive me if this query has appeared before (as I'm sure it will have). I note that the minimum wall thickness for White, Strong & Flexible is 0.7mm. I'm doing some architectural modelling, including engineering elements made up of struts. Does the minimum wall thickness mean that the minimum cross-section of a strut is 0.7 x 0.7mm? Or is it be 0.7 x 0.2mm, reflecting the minimum detail dimension?